All of my LOR were sent via Interfolio. Some of the LOR writers were out of state so I had to email and gave them instructions for scanning in typed letters on letterhead. Interfolio also sends info when you set up a request to be sent. For local LOR writers, I found it easier to stop by and hand deliver a stamped and pre-addressed (Interfolio address) envelope with the printed Interfolio request in a folder. All they had to do then was print the LOR on letterhead, include the Interfolio request, and drop it in the mail. It was pretty stright forward and I appreciated Interfolio's customer service.